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Unread 03-02-2013, 07:51 PM   #1
weeds94yj
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1994 YJ Wrangler 
 
Join Date: Oct 2012
Location: carroll, iowa
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measuring for rear driveshaft xj to yj

i am in the process of doing a frame restoration and putting a 350/700r4/np231c in my 94 yj my first question is dose the np231c use the same u joint as the 231j and also when im cutting and rewelding my xj driveshaft do were do i want the slip to be when it is installed on the jeep in the middle or closer to the top or bottom thanks.

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Unread 03-03-2013, 05:27 PM   #2
Joe Dillard
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1991 YJ Wrangler 
 
Join Date: May 2004
Location: King George, VA
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I have done several XJ shaft shortening mods for use in a YJ. I like to do them so that there's ~1" of compression left when the Jeep sits statically with the weight on it and the pinion is dialed correctly.
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Unread 03-03-2013, 08:40 PM   #3
weeds94yj
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1994 YJ Wrangler 
 
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okay thanks that is what i was looking for and these driveshafts will work fine with a four inch lift right?
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Unread 03-03-2013, 10:32 PM   #4
Joe Dillard
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by weeds94yj View Post
okay thanks that is what i was looking for and these driveshafts will work fine with a four inch lift right?
Yep, there seem to be enough (what's that word I'm looking for?) play in them in a 4" YJ suspension lift to allow for the suspension to droop & the ujoints not bind.
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Unread 03-04-2013, 12:38 PM   #5
PA_YJ19
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1994 YJ Wrangler 
 
Join Date: Mar 2011
Location: Altoona, PA
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Quote:
Originally Posted by Joe Dillard
I have done several XJ shaft shortening mods for use in a YJ. I like to do them so that there's ~1" of compression left when the Jeep sits statically with the weight on it and the pinion is dialed correctly.
I was wondering how other people did it, I did 1 1/2" of compression left so it had the same amount compressed as extended. I really had no idea what was correct tho. I haven't had ne issues with it yet . I have another one I'm going to weld up for my spare so I guess ill do it at 1" compressed n so how it works. Never hurts to ask I guess, like the OP.
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Unread 03-04-2013, 08:14 PM   #6
weeds94yj
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1994 YJ Wrangler 
 
Join Date: Oct 2012
Location: carroll, iowa
Posts: 9
Quote:
Originally Posted by PA_YJ19 View Post
I was wondering how other people did it, I did 1 1/2" of compression left so it had the same amount compressed as extended. I really had no idea what was correct tho. I haven't had ne issues with it yet . I have another one I'm going to weld up for my spare so I guess ill do it at 1" compressed n so how it works. Never hurts to ask I guess, like the OP.
i thought i read there was four inches of play in the slip
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